Error with sitemap plugin

Hello, i use plugin - https://www.litecart.net/en/addons/497/sitemap-generator

and i show the following error:
https://popravime.bg/feeds/sitemap.xml

LiteCart 2.5.4

[18-Dec-2023 08:38:03 Europe/Sofia] [8 times] Notice: Undefined index: scheme in ~/includes/entities/ent_SitemapGenerator.inc.php (Line 26)
← ~/includes/modules/mod_jobs.inc.php (Line 34) in process()
← ~/pages/push_jobs.inc.php (Line 25) in process()
← ~/includes/library/lib_route.inc.php (Line 125) in include()
← ~/index.php (Line 51) in process()

Hi Vladislaw.
 Can you install a newest verison of this plugin, please?
https://www.litecart.net/en/addons/497/sitemap-generator

 Make sure to replace old files with new one.

Again

https://popravime.bg/feeds/sitemap.xml

Can you post the settings page, please ?

Hi Vladislaw, can you delete the "Array" text and replace it with: regional_settings
Also delete the trailing / at the end of the URL link of your website.
Check the settings:

Когато го настрои�
да работи сега, се появи следната грешка

Fatal error: syntax error, unexpected '->' (T_OBJECT_OPERATOR) in ~/includes/entities/ent_SitemapGenerator.inc.php (Line 26)

Seems like you're using older PHP version. 
Can you update to at least version 8.1 ?

Ok, now is 8.1

https://popravime.bg/feeds/sitemap.xml

Set working hours of this module to, eg. 05:00-06:00
After that click the "Run now" on the Job Modules page.
Wait for it to finish and let me know the result.

Did you copied new files to the corresponding folders?
 Can you uninstall this module and install it again by replacing the old files with new ones?
There are two files for this module that should be placed in respective folders.
 You have instructions attached in the Readme file.

Yes, I uninstall from the admin panel.
I delete the 2 files and upload the new ones, but still the same thing.

Now the plugin started, it doesn't give errors, but the sitemap is empty
https://popravime.bg/feeds/sitemap.xml

########################################################################
# job_sitemap_generator executed at 2024-01-23 11:14:03 ################
########################################################################

Scanned host: popravime.bg
Found and added: 0 pages
Generated XML file: /home/nppharma/popravime.bg/feeds/sitemap.xml
Execution time of script = 0.00049686431884766 sec

########################################################################
# Completed in 0.001 s #################################################
########################################################################

You will need to enter the site URL with prefix, like this:
https://popravime.bg