The import_workplace_plugins stopped working after the recent upgrade

Execute scheduled task: Import Workplace plugins strings (local_amos\task\import_workplace_plugins)

... started 15:52:01. Current memory use 6.6MB.

 Importing strings from enrol_dynamicrule for MOODLE_37_STABLE

!!! Exception - Class 'local_amos\external\api' not found !!!

!! 

Error code: generalexceptionmessage !!

!! Stack trace: * line 94 of /local/amos/classes/task/import_workplace_plugins.php: Error thrown

* line 253 of /lib/cronlib.php: call to local_amos\task\import_workplace_plugins->execute()

* line 120 of /lib/cronlib.php: call to cron_run_inner_scheduled_task()

* line 73 of /lib/cronlib.php: call to cron_run_scheduled_tasks()

* line 178 of /admin/cli/cron.php: call to cron_run()

 !!