michaelsy lmatias Suddenly, ... Check if your DokuWiki is compatible with the PHP version you are running. Maybe the provider has set the PHP version to 8.x? lmatias TypeError: Unsupported operand types: null & string PHP 8.x is more restrictive than 7.x. - Michael Sy.
andi lmatias Suddenly Computers are deterministic. Nothing just suddenly stops. Something must have changed. What was it? You're not telling us anything about your environment. The PHP and DokuWiki versions would be a good start.
lmatias Php version was upgraded to 7.4.8 in september 2nd by the provider...but I was able to login and make changes at October 7th. Dokuwiki version is 2023-04-04a "Jack Jackrum" Open to more ideas.
terrafrost This is an issue that was fixed in phpseclib 3.0.33: https://github.com/phpseclib/phpseclib/pull/1949 https://github.com/phpseclib/phpseclib/releases/tag/3.0.33
lmatias Replaced the lines of code straight into the base.php file...problem solved. Thanks @terrafrost !
rec lmatias I have exactly he same problem. But: which lines of code? and which file base.php (there are at least 5 files same name)? thanks,
terrafrost rec See https://github.com/phpseclib/phpseclib/commit/173bb38e67e30429edb69e21a8b16d8a0c86c355
rongrimes I hit the same problem in reinstalling dokuwiki in a new location. The terrafrost fix above worked for me. Thanks!