Update from Varbase 8.8.1 to 8.8.2 faild

by using vartbase-update update fails see output below

.update-error-log output

[success] Database dump saved to /home/joachim/www/update_backups/db.sql
^[[32mPreparing composer.json for Varbase updates...^[(B^[[0m
^[[32mUpdating Varbase...^[(B^[[0m

[Composer\Json\JsonValidationException]
"./composer.json" does not match the expected JSON schema:
- version : Does not match the regex pattern ^v?\d+(((\.\d+)?\.\d+)?\.\d+)
?