SERP is crushing during a text backup when it tries to extract UserLoginVc. An extract from the hansa.log file is as follows. What could be the cause of this?

2022-01-29 11:24:46 Sync started
2022-01-29 11:24:46 8.5 2021-08-28 (build 85400018)
2022-01-29 11:24:46 *** Running with Cloud Backups, plan level 1 ***
2022-01-29 11:24:46 Exporting Text Backup
2022-01-29 11:24:46 Mailbox Browse 14
2022-01-29 11:24:46 MailReadVc 250
2022-01-29 11:24:46 Email 73
2022-01-29 11:24:46 Attached Files 5
2022-01-29 11:24:46 Record Links 47790
2022-01-29 11:24:46 RHistVc 344633

2022-01-29 11:24:52 Notes 7
2022-01-29 11:24:52 Email Queue 52
2022-01-29 11:24:52 WRVc 49
2022-01-29 11:24:52 Signatures 1

2022-01-29 11:24:52 Navigation Links 161
2022-01-29 11:24:52 Global Users 3
2022-01-29 11:24:52 UserLoginVc 1205850
Segmentation fault (core dumped)