PHP Error: preg_match(): Compilation failed: quantifier does not follow a repeatable item at offset 0

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Nextcloud version (eg, 20.0.5): 25.0.2
Operating system and version (eg, Ubuntu 20.04): Ubuntu 20.04
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.41
PHP version (eg, 7.4): 8.0.26

The issue you are facing:
I tried to search this issue in the forum but couldn’t found any, hoping this community can help me. I do not see any error in overview section however Admin longs continuously generating these logs as mentioned in title. I have updated PHP version last week so not sure it this started after upgrade. Please help me to clear these logs:-

Is this the first time you’ve seen this error? (Y/N):

Steps to replicate it: I see this continuously not sure how to reproduce.

The output of your Nextcloud log in Admin > Logging:

[PHP] Error: Error: preg_match(): Compilation failed: quantifier does not follow a repeatable item at offset 0 at /var/www/nextcloud/apps/ransomware_protection/lib/Analyzer.php#257 at <<closure>>

 0. <<closure>>
    OC\Log\ErrorHandler::onError()
 1. /var/www/nextcloud/apps/ransomware_protection/lib/Analyzer.php line 257
    preg_match()
 2. /var/www/nextcloud/apps/ransomware_protection/lib/Analyzer.php line 218
    OCA\RansomwareProtection\Analyzer->checkExtension()
 3. /var/www/nextcloud/apps/ransomware_protection/lib/CacheWrapper.php line 57
    OCA\RansomwareProtection\Analyzer->checkPath()
 4. <<closure>>
    OCA\RansomwareProtection\CacheWrapper->formatCacheEntry()
 5. /var/www/nextcloud/lib/private/Files/Cache/Wrapper/CacheWrapper.php line 104
    array_map()
 6. /var/www/nextcloud/lib/private/Files/View.php line 1470
    OC\Files\Cache\Wrapper\CacheWrapper->getFolderContentsById()
 7. /var/www/nextcloud/lib/private/Files/Node/Folder.php line 101
    OC\Files\View->getDirectoryContent()
 8. /var/www/nextcloud/apps/dav/lib/Connector/Sabre/Directory.php line 260
    OC\Files\Node\Folder->getDirectoryListing()
 9. /var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Tree.php line 200
    OCA\DAV\Connector\Sabre\Directory->getChildren()
10. /var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 900
    Sabre\DAV\Tree->getChildren()
11. /var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 982
    Sabre\DAV\Server->generatePathNodes()
12. /var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 1662
    Sabre\DAV\Server->getPropertiesIteratorForPath()
13. /var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 1647
    Sabre\DAV\Server->writeMultiStatus()
14. /var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php line 346
    Sabre\DAV\Server->generateMultiStatus()
15. /var/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php line 89
    Sabre\DAV\CorePlugin->httpPropFind()
16. /var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 472
    Sabre\DAV\Server->emit()
17. /var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 253
    Sabre\DAV\Server->invokeMethod()
18. /var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 321
    Sabre\DAV\Server->start()
19. /var/www/nextcloud/apps/dav/lib/Server.php line 360
    Sabre\DAV\Server->exec()
20. /var/www/nextcloud/apps/dav/appinfo/v2/remote.php line 35
    OCA\DAV\Server->exec()
21. /var/www/nextcloud/remote.php line 171
    require_once("/var/www/nextcl ... p")

PROPFIND /remote.php/dav/files/user/
from x.x.x.x by user at 2023-01-05T14:51:00-05:00

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

{
“instanceid”: “REMOVED SENSITIVE VALUE”,
“passwordsalt”: “REMOVED SENSITIVE VALUE”,
“secret”: “REMOVED SENSITIVE VALUE”,
“trusted_domains”: [
“10.0.0.112” ],
“datadirectory”: “REMOVED SENSITIVE VALUE”,
“dbtype”: “mysql”,
“version”: “25.0.2.3”,
“overwrite.cli.url”: “http://10.0.0.112”,
“dbname”: “REMOVED SENSITIVE VALUE”,
“dbhost”: “REMOVED SENSITIVE VALUE”,
“dbport”: “”,
“dbtableprefix”: “oc_”,
“mysql.utf8mb4”: true,
“dbuser”: “REMOVED SENSITIVE VALUE”,
“dbpassword”: “REMOVED SENSITIVE VALUE”,
“installed”: true,
“default_locale”: “en_US”,
“default_phone_region”: “US”,
“logtimezone”: “America/New_York”,
“log_rotate_size”: 52428800,
“htaccess.RewriteBase”: “/”,
“twofactor_enforced”: “true”,
“twofactor_enforced_groups”: ,
“twofactor_enforced_excluded_groups”: ,
“memcache.local”: “\OC\Memcache\Redis”,
“memcache.locking”: “\OC\Memcache\Redis”,
“filelocking.enabled”: true,
“redis”: {
“host”: “REMOVED SENSITIVE VALUE”,
“port”: 0,
“timeout”: 0
}
}

The output of your Apache/nginx/system log in /var/log/____:

PASTE HERE

PASTE HERE


Output errors in nextcloud.log in /var/www/ or as admin user in top right menu, filtering for errors. Use a pastebin service if necessary.

PASTE HERE