PROBLEM Server Error 500 from jquery.autocomplete in i18n_ plugins

[dipohl]

Hi!

I see a lot of Server Errors 500 in my webserver logs:

Code:

IP-Address - - [06/May/2021:12:30:47 +0200] "GET /plugins/i18n_base/css/jquery.autocomplete.css HTTP/1.1" 500 517 "https://example.org/admin/load.php?id=i18n_base" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0"
IP-Address - - [06/May/2021:12:30:47 +0200] "GET /plugins/i18n_base/js/jquery.autocomplete.min.js HTTP/1.1" 500 517 "https://example.org/admin/load.php?id=i18n_base" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0"
IP-Address - - [06/May/2021:12:30:47 +0200] "GET /plugins/i18n_base/js/jquery.autocomplete.min.js HTTP/1.1" 500 517 "https://example.org/admin/load.php?id=i18n_base" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0"
IP-Address - - [06/May/2021:12:30:47 +0200] "GET /plugins/i18n_base/css/jquery.autocomplete.css HTTP/1.1" 500 517 "https://example.org/admin/load.php?id=i18n_base" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0"

Code:

IP-Address - - [30/Apr/2021:15:40:42 +0200] "GET /plugins/i18n_navigation/js/jquery.autocomplete.min.js HTTP/1.1" 500 517 "https://example.org/admin/edit.php?id=index&upd=edit-success&type=edit" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0"
IP-Address - - [30/Apr/2021:15:40:42 +0200] "GET /plugins/i18n_navigation/css/jquery.autocomplete.css HTTP/1.1" 500 517 "https://example.org/admin/edit.php?id=index&upd=edit-success&type=edit" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0"

How can I find the reason for that and solve the problem?

Thanks in advance for your help and kind regards,

Gp