I've tried to find the answer to this question in this forum but either I missed it, or it simply wasn't clear. I only ship USPS priority mail flat rate envelopes. So I have that method selected. I don't have an weights on my products because they fit in the flate rate envelope.
Upon checkout I get this error below
"2147219094 - Service must be Express, Express SH, Express Commercial, Express SH Commercial, First Class, Priority, Priority Commercial, Parcel, Library, BPM, Media, ALL or ONLINE; you passed NONE"
Is there coding I can remove to not get this method and only ship via the priority mail flat rate envelope I have selected my admin.