Not syncing due to invalid character '<'

[Reallynotgood]

When I try to press sync, the files are not being synced anymore.
In the logfile, I get the error "ERROR - invalid character '<' looking for beginning of value" and "(D:/jiawei/projects/lominus/internal/cron/cron.go:github.com/beebeeoii/lominus/internal/cron.createJob.func1:127)"

Not sure why this happens.