Thank you @hillel @ben for quick response.
I found the CapRover “captain-definition file” for InvoiceNinja v5.1.53 here one-click-apps/invoiceninja.yml at master · caprover/one-click-apps · GitHub .
So maybe we can just update the CapRover InvoiceNinja “captain-definition file” to v5.1.70. (also on Github)
I think this might be much easier than debugging the old version and will update/fix the app for all CapRover users.