It looks like since ~11:30 UTC today, post requests to pl.wikibooks.org failed due to execution timeouts
/srv/mediawiki/php-1.35.0-wmf.3/extensions/Scribunto/includes/engines/LuaCommon/UstringLibrary.php:592
```
script_filename = /srv/mediawiki/docroot/wikibooks.org/w/api.php
[0x00007f0dc381f190] call() /srv/mediawiki/php-1.35.0-wmf.3/extensions/Scribunto/includes/engines/LuaSandbox/Engine.php:314
[0x00007f0dc381f0e0] callFunction() /srv/mediawiki/php-1.35.0-wmf.3/extensions/Scribunto/includes/engines/LuaCommon/LuaCommon.php:292
[0x00007f0dc381f040] executeFunctionChunk() /srv/mediawiki/php-1.35.0-wmf.3/extensions/Scribunto/includes/engines/LuaCommon/LuaCommon.php:979
[0x00007f0dc381ef90] invoke() /srv/mediawiki/php-1.35.0-wmf.3/extensions/Scribunto/includes/common/Hooks.php:128
[0x00007f0dc381ed80] invokeHook() /srv/mediawiki/php-1.35.0-wmf.3/includes/parser/Parser.php:3668
[0x00007f0dc381ec20] callParserFunction() /srv/mediawiki/php-1.35.0-wmf.3/includes/parser/Parser.php:3373
[0x00007f0dc381e910] braceSubstitution() /srv/mediawiki/php-1.35.0-wmf.3/includes/parser/PPFrame_Hash.php:253
[0x00007f0dc381e730] expand() /srv/mediawiki/php-1.35.0-wmf.3/includes/parser/Parser.php:3290
[0x00007f0dc381e420] braceSubstitution() /srv/mediawiki/php-1.35.0-wmf.3/includes/parser/PPFrame_Hash.php:253
[0x00007f0dc381e240] expand() /srv/mediawiki/php-1.35.0-wmf.3/includes/parser/Parser.php:3549
[0x00007f0dc381df30] braceSubstitution() /srv/mediawiki/php-1.35.0-wmf.3/includes/parser/PPFrame_Hash.php:253
[0x00007f0dc381dd50] expand() /srv/mediawiki/php-1.35.0-wmf.3/includes/parser/Parser.php:3549
[0x00007f0dc381da40] braceSubstitution() /srv/mediawiki/php-1.35.0-wmf.3/includes/parser/PPFrame_Hash.php:253
[0x00007f0dc381d860] expand() /srv/mediawiki/php-1.35.0-wmf.3/includes/parser/Parser.php:3187
[0x00007f0dc381d790] replaceVariables() /srv/mediawiki/php-1.35.0-wmf.3/includes/parser/Parser.php:876
[0x00007f0dc381d6b0] preprocess() /srv/mediawiki/php-1.35.0-wmf.3/extensions/ParsoidBatchAPI/includes/ApiParsoidBatch.php:222
[0x00007f0dc381d5b0] preprocess() /srv/mediawiki/php-1.35.0-wmf.3/extensions/ParsoidBatchAPI/includes/ApiParsoidBatch.php:118
[0x00007f0dc381d380] execute() /srv/mediawiki/php-1.35.0-wmf.3/includes/api/ApiMain.php:1602
[0x00007f0dc381d300] executeAction() /srv/mediawiki/php-1.35.0-wmf.3/includes/api/ApiMain.php:538
[0x00007f0dc381d240] executeActionWithErrorHandling() /srv/mediawiki/php-1.35.0-wmf.3/includes/api/ApiMain.php:509
```