Before upload CashApp v3.0.3 file first go your whmcs System Settings > Addons Modules > Deactivate CashApp Payment Module then go System Settings > Payment Gateways > Manage > Deactivate CashApp Then delete file this path
/modules/addons/cashapp
/modules/gateways/cashapp
then upload CashApp_v3.0.3.zip then extract
New Version all settings on System Settings > Payment Gateways
On CashApp v3.0.3 you can test connection like https://mywhmcs.com/modules/gateways/callback/cashapp.php?action=testconnection
If you want change text on invoice page like on image
for this text change edit this file /modules/gateways/cashapp/lang/english.php
carefully edit
