So i found some more logging in the suitecrm_data folder in file suitecrm.log. It just contains a pile of these lines…
Sat May 15 17:34:02 2021 [19898][1][FATAL] SCHEDULERS: could not get an IMAP connection resource for ID [ d177088e-479a-885c-099f-609ec9849c76 ]. Skipping mailbox [ Support Email ].
Sat May 15 17:36:02 2021 [19908][1][FATAL] SCHEDULERS: could not get an IMAP connection resource for ID [ d177088e-479a-885c-099f-609ec9849c76 ]. Skipping mailbox [ Support Email ].
Mon May 17 13:24:05 2021 [110][1][FATAL] SCHEDULERS: could not get an IMAP connection resource for ID [ d177088e-479a-885c-099f-609ec9849c76 ]. Skipping mailbox [ Support Email ].
Mon May 17 13:26:03 2021 [128][1][FATAL] SCHEDULERS: could not get an IMAP connection resource for ID [ d177088e-479a-885c-099f-609ec9849c76 ]. Skipping mailbox [ Support Email ].
Mon May 17 13:28:02 2021 [138][1][FATAL] SCHEDULERS: could not get an IMAP connection resource for ID [ d177088e-479a-885c-099f-609ec9849c76 ]. Skipping mailbox [ Support Email ].
Mon May 17 13:30:01 2021 [148][1][FATAL] SCHEDULERS: could not get an IMAP connection resource for ID [ d177088e-479a-885c-099f-609ec9849c76 ]. Skipping mailbox [ Support Email ].