Errors since auto-upgrade to 2.4.0

Hi,

My litecart installation has recently auto upgraded via Softaculous to 2.4.0 from 2.3.5, but I have received the message below. The shop is sitill visible and appears to work - https://simon-taylor.com/shop/

Please advise.

Many thanks, Simon

LiteCart 2.4.0

← ~/includes/library/lib_database.inc.php (Line 161) in connect()
← ~/includes/library/lib_settings.inc.php (Line 10) in query()
← ~/includes/autoloader.inc.php (Line 107) in init()
← ~/index.php (Line 18) in spl_autoload_call()
Request: GET /shop/push_jobs HTTP/1.1
Host: simon-taylor.com
Client: 199.231.163.106 (dallas.serverquality.com)
User Agent: Wget/1.14 (linux-gnu)

[24-Apr-2022 22:48:32 UTC] [19 times] PHP Warning:  file_put_contents(): Only 0 of 31 bytes written, possibly out of free disk space in /home/taylorc/public_html/simon-taylor.com/shop/vqmod/vqmod.php on line 127

[24-Apr-2022 22:48:32 UTC] [9 times] PHP Warning:  file_put_contents(): Only 0 of 28 bytes written, possibly out of free disk space in /home/taylorc/public_html/simon-taylor.com/shop/vqmod/vqmod.php on line 127

[24-Apr-2022 22:48:32 UTC] [9 times] Warning: file_put_contents(): Only 0 of 41 bytes written, possibly out of free disk space in ~/vqmod/vqmod.php (Line 127)
← ~/includes/library/lib_vmod.inc.php (Line 37) in modCheck()
← ~/includes/autoloader.inc.php (Line 102) in check()
← ~/includes/app_header.inc.php (Line 36) in class_exists()
← ~/index.php (Line 16) in require_once()
Request: GET /shop/en?uvkkbv HTTP/1.1
Host: simon-taylor.com
Client: 114.119.149.247 (petalbot-114-119-149-247.petalsearch.com)
User Agent: Mozilla/5.0 (Linux; Android 7.0;) AppleWebKit/537.36 (KHTML, like Gecko) Mobile Safari/537.36 (compatible; PetalBot;+https://webmaster.petalsearch.com/site/petalbot)

[24-Apr-2022 22:48:32 UTC] [8 times] Warning: file_put_contents(): Only 0 of 35 bytes written, possibly out of free disk space in ~/vqmod/vqmod.php (Line 127)
← ~/includes/library/lib_vmod.inc.php (Line 37) in modCheck()
← ~/includes/autoloader.inc.php (Line 102) in check()
← ~/includes/library/lib_compression.inc.php (Line 6) in spl_autoload_call()
← ~/includes/autoloader.inc.php (Line 107) in init()
← ~/includes/app_header.inc.php (Line 36) in class_exists()
← ~/index.php (Line 16) in require_once()
Request: GET /shop/en?uvkkbv HTTP/1.1
Host: simon-taylor.com
Client: 114.119.149.247 (petalbot-114-119-149-247.petalsearch.com)
User Agent: Mozilla/5.0 (Linux; Android 7.0;) AppleWebKit/537.36 (KHTML, like Gecko) Mobile Safari/537.36 (compatible; PetalBot;+https://webmaster.petalsearch.com/site/petalbot)

[24-Apr-2022 21:56:56 UTC] [9 times] Warning: file_put_contents(): Only 0 of 37 bytes written, possibly out of free disk space in ~/vqmod/vqmod.php (Line 127)
← ~/includes/library/lib_vmod.inc.php (Line 37) in modCheck()
← ~/includes/autoloader.inc.php (Line 102) in check()
← ~/includes/app_header.inc.php (Line 37) in class_exists()
← ~/index.php (Line 16) in require_onc[24-Apr-2022 22:47:37 UTC] Warning: Undefined constant MYSQLI_OPT_INT_AND_FLOAT_NATIVE in ~/includes/library/lib_database.inc.php (Line 23)
← ~/includes/library/lib_database.inc.php (Line 161) in connect()
← ~/includes/library/lib_settings.inc.php (Line 10) in query()
← ~/includes/autoloader.inc.php (Line 107) in init()
← ~/index.php (Line 18) in spl_autoload_call()
Request: GET /shop/en/?daqldvku= HTTP/1.1
Host: simon-taylor.com
Client: 51.222.253.8 (ip8.ip-51-222-253.net)
User Agent: Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)

[24-Apr-2022 18:47:40 UTC] Warning: file_put_c[24-Apr-2022 18:52:04 UTC] Warning: Undefined constant MYSQLI_OPT_INT_AND_FLOAT_NATIVE in ~/includes/library/lib_database.inc.php (Line 23)
← ~/includes/library/lib_database.inc.php (Line 161) in connect()
← ~/includes/library/lib_settings.inc.php (Line 10) in query()
← ~/includes/autoloader.inc.php (Line 107) in init()
← ~/index.php (Line 18) in spl_autoload_call()
Request: GET /shop/ajax/cart.json?_=1650825409653 HTTP/1.1
Host: simon-taylor.com
Client: 213.202.189.41 (213-202-189-41.bas504.dsl.esat.net)
User Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.3 Mobile/15E148 Safari/604.1
Referer: http://simon-taylor.com/shop/original-artworks-c-2/original-racing-works-c-9/ayrton-senna-mclaren-mp4-5-p-53

[24-Apr-2022 23:07:35 UTC] [19 times] Warning: mysqli_real_connect(): (HY000/2002): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in ~/includes/library/lib_database.inc.php (Line 26)
← ~/includes/library/lib_database.inc.php (Line 161) in connect()
← ~/includes/library/lib_settings.inc.php (Line 10) in query()
← ~/includes/autoloader.inc.php (Line 107) in init()
← ~/index.php (Line 18) in spl_autoload_call()
Request: GET /shop/fine-art-prints-c-1/motor-racing-prints-c-5/michael-schumacher-ferrari-f310-p-8 HTTP/1.1
Host: simon-taylor.com
Client: 66.249.73.90 (crawl-66-249-73-90.googlebot.com)
User Agent: Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

[24-Apr-2022 23:07:35 UTC] [19 times] Fatal error: Could not connect to database: 2002 - Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in ~/includes/library/lib_database.inc.php (Line 27)
← ~/includes/library/lib_database.inc.php (Line 161) in connect()
← ~/includes/library/lib_settings.inc.php (Line 10) in query()
← ~/includes/autoloader.inc.php (Line 107) in init()
← ~/index.php (Line 18) in spl_autoload_call()
Request: GET /shop/fine-art-prints-c-1/motor-racing-prints-c-5/michael-schumacher-ferrari-f310-p-8 HTTP/1.1
Host: simon-taylor.com
Client: 66.249.73.90 (crawl-66-249-73-90.googlebot.com)
User Agent: Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

[24-Apr-2022 19:13:23 UTC] PHP Warning:  file_put_contents(): Only 0 of 28 byt[24-Apr-2022 19:15:52 UTC] Warning: Undefined constant MYSQLI_OPT_INT_AND_FLOAT_NATIVE in ~/includes/library/lib_database.inc.php (Line 23)
← ~/includes/library/lib_database.inc.php (Line 161) in connect()
← ~/includes/library/lib_settings.inc.php (Line 10) in query()
← ~/includes/autoloader.inc.php (Line 107) in init()
← ~/index.php (Line 18) in spl_autoload_call()
Request: GET /shop/en?tjdhnt HTTP/1.1
Host: simon-taylor.com
Client: 114.119.131.105 (petalbot-114-119-131-105.petalsearch.com)
User Agent: Mozilla/5.0 (Linux; Android 7.0;) AppleWebKit/537.36 (KHTML, like Gecko) Mobile Safari/537.36 (compatible; PetalBot;+https://webmaster.petalsearch.com/site/petalbot)

[24-Apr-2022 22:04:50 Europe/London] Warning: file_put_contents(): Only 0 of 3798 bytes written, possibly out of free disk space in ~/includes/library/lib_cache.inc.php (Line 269)
← ~/pages/category.inc.php (Line 111) in set()
← ~/includes/library/lib_route.inc.php (Line 125) in include()
← ~/index.php (Line 40) in process()
Request: GET /shop/gifts-c-3/?page=21&sort=price HTTP/1.1
Host: simon-taylor.com
Client: 114.119.149.247 (petalbot-114-119-149-247.petalsearch.com)
User Agent: Mozilla/5.0 (Linux; Android 7.0;) AppleWebKit/537.36 (KHTML, like Gecko) Mobile Safari/537.36 (compatible; PetalBot;+https://webmaster.petalsearch.com/site/petalbot)

[24-Apr-2022 22:04:50 Europe/London] Warning: file_put_contents(): Only 0 of 658 bytes written, possibly out of free disk space in ~/includes/library/lib_cache.inc.php (Line 269)
← ~/includes/library/lib_cache.inc.php (Line 348) in set()
← ~/includes/boxes/box_category_tree.inc.php (Line 57) in end_capture()
← ~/includes/templates/Simon.catalog/pages/category.inc.php (Line 2) in include()
← ~/includes/entities/ent_view.inc.php (Line 23) in include()
← ~/includes/entities/ent_view.inc.php (Line 28) in {closure}()
← ~/pages/category.inc.php (Line 114) in stitch()
← ~/includes/library/lib_route.inc.php (Line 125) in include()
← ~/index.php (Line 40) in process()
Request: GET /shop/gifts-c-3/?page=21&sort=price HTTP/1.1
Host: simon-taylor.com
Client: 114.119.149.247 (petalbot-114-119-149-247.petalsearch.com)
User Agent: Mozilla/5.0 (Linux; Android 7.0;) AppleWebKit/537.36 (KHTML, like Gecko) Mobile Safari/537.36 (compatible; PetalBot;+https://webmaster.petalsearch.com/site/petalbot)

[24-Apr-2022 21:17:22 UTC] Warning: file_put_contents(): Only 0 of 35 bytes written, possibly out of free disk spa[24-Apr-2022 21:27:40 UTC] Warning: Undefined constant MYSQLI_OPT_INT_AND_FLOAT_NATIVE in ~/includes/library/lib_database.inc.php (Line 23)
← ~/includes/library/lib_database.inc.php (Line 161) in connect()
← ~/includes/library/lib_settings.inc.php (Line 10) in query()
← ~/includes/autoloader.inc.php (Line 107) in init()
← ~/index.php (Line 18) in spl_autoload_call()
Request: GET /shop/gifts-c-3/?page=4&sort=popularity&category_id=3&list_style=columns HTTP/1.1
Host: simon-taylor.com
Client: 114.119.149.247 (petalbot-114-119-149-247.petalsearch.com)
User Agent: Mozilla/5.0 (Linux; Android 7.0;) AppleWebKit/537.36 (KHTML, like Gecko) Mobile Safari/537.36 (compatible; PetalBot;+https://webmaster.petalsearch.com/site/petalbot)

[24-Apr-2022 22:48:32 UTC] Warning: file_put_contents(): Only 0 of 37 bytes written, possibly out of f[24-Apr-2022 22:51:43 UTC] Warning: Undefined constant MYSQLI_OPT_INT_AND_FLOAT_NATIVE in ~/includes/library/lib_database.inc.php (Line 23)
← ~/includes/library/lib_database.inc.php (Line 161) in connect()
← ~/includes/library/lib_settings.inc.php (Line 10) in query()
← ~/includes/autoloader.inc.php (Line 107) in init()
← ~/index.php (Line 18) in spl_autoload_call()
Request: GET /shop/gifts-c-3?page=43&sort=price&category_id=3 HTTP/1.1
Host: simon-taylor.com
Client: 114.119.131.105 (petalbot-114-119-131-105.petalsearch.com)
User Agent: Mozilla/5.0 (Linux; Android 7.0;) AppleWebKit/537.36 (KHTML, like Gecko) Mobile Safari/537.36 (compatible; PetalBot;+https://webmaster.petalsearch.com/site/petalbot)

See this thread for MYSQLI_OPT_INT_AND_FLOAT_NATIVE
https://www.litecart.net/en/forums/15/errors-and-troubleshooting/16698/mysqli-constant-mysqli-opt-int-and-float-native-is-undefined

Out of free disk space you will have to investigate yourself.