I upgraded to the latest release last night and the upgrade appeared to have succeeded, but there were issues as I did it—out of memory issues on the sever (which I think I resolved now by editing the correct php.ini file), so may not have completed all tasks.
Symptoms:
Status page does not show anything at all
Going to the CiviCRM menu initially results in an error, but refreshing browser immediately resolves it.
Log shows Error: Undefined class constant 'MAJOR_VERSION' in GuzzleHttp\Utils::defaultUserAgent() (line 116 of ... /sites/all/modules/civicrm/vendor/guzzlehttp/guzzle/src/Utils.php).
CiviCRM Cron results in function should not be reachable Caller: CRM_Contact_BAO_Query::whereClauseSingle Array ( [civi.tag] => deprecated )
User deprecated function: function should not be reachable Caller: CRM_Contact_BAO_Query::whereClauseSingle in CRM_Core_Error::deprecatedWarning() (line 1129 of .../public_html/sites/all/modules/civicrm/CRM/Core/Error.php).
Warning: file_get_contents(https://latest.civicrm.org/stable.php?format=summary): Failed to open stream: no suitable wrapper could be found in CRM_Utils_VersionCheck->pingBack() (line 297 of .../sites/all/modules/civicrm/CRM/Utils/VersionCheck.php).
Ideas and solutions?
"CIVI_VERSION": "5.70.0", "CMS_VERSION": "7.98", (Drupal) domain is using php 7.4 (higher versions are right now resulting in website errors.) shell for upgrade was using php 8.1