RAK3172 AT_PARAM_ERROR when sending

I receive an error when I send a base64 encoded packet, however after I send a single byte payload the original packet is sent error free. What do I need to do the fix this? Thanks in advance for any help!!

Here is an example:

AT+SEND=12:A5000000010000013C53333300350001000A001001A000110441BA49AA00120441B625DB00130442ED4FCC00010106FFD00106FFD20106FFD40106FFD6010600010105
<< AT_PARAM_ERROR
AT+SEND=12:00
<<OK
<< +EVT:TX_DONE
AT+SEND=12:A5000000010000013C53333300350001000A001001A000110441BA49AA00120441B625DB00130442ED4FCC00010106FFD00106FFD20106FFD40106FFD6010600010105
<< OK
<< +EVT:TX_DONE