Changing caching settings results in mysql error and segment fault

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When attempting to make any changes to Systems & Settings/Optimization/Cache & Speed Settings or Clear Cache, I get a Service Unavailable error. The only clue syslog shows is the following. I have also included the output from Environment Information. Any ideas? Thanks

Mar 02 21:53:14 myserver.com kernel: php-fpm[32550]: segfault at 7fb0fd7fa580 ip 00004345a0c4a2bd sp 00007faac0ce33d8 error 4 in php-fpm[5645b093b000+46e000]
Mar 02 21:53:14 myserver.com mysqld[32308]: 2020-03-02 21:53:14 150 [Warning] Aborted connection 150 to db: 'dbname' user: 'username' host: 'localhost' (Got an error reading communication packets)


Environment Information shows the following:

# concrete5 Version
Core Version - 8.5.1
Version Installed - 8.5.1
Database Version - 20190301133300
# concrete5 Packages
Amplica (1.1.1), Easy Weather (1.0.0), Event Calendar PRO (2.3.16), Greenbean String (1.5), Page Redirect (2.0), Page Selector Attribute (2.0), PDF Viewer (1.0.1), Quick Tabs (1.0)
# concrete5 Overrides
None
# concrete5 Cache Settings
Block Cache - Off
Overrides Cache - Off
Full Page Caching - Off
Full Page Cache Lifetime - Every 6 hours (default setting).
# Server Software
Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips

 
hutman replied on at Permalink Best Answer Reply
hutman
NotionCommotion replied on at Permalink Reply
Thanks hutman, Your link was not valid but I will downgrade php and see if it works and if so post my findings.
NotionCommotion replied on at Permalink Reply
Actually, it isn't just your link that is broken but many of the concrete5 links. Do you know which PHP version is recommended? If not, which PHP version are you using? Thanks
hutman replied on at Permalink Reply
hutman
I believe the newest version is PHP 7.3 ready, but I am not sure about v8.5.1 that might be PHP 7.2
NotionCommotion replied on at Permalink Reply
Thanks again. Running php7.2 and all is good.