I tried to use rh-php73, rh-php72 without success @mrmarkuz, fun I got an 500 error without any log traces.
Do you have some thoughts @danb35 ?
Does horde from epel is compatible with these phpversion, maybe we miss a rpm that we could have from remi scl.
By the way I still do not understand the need of php scl, for what I tested everythings was workable with php54.
Edit: reading this Horde login problems
Horde 5 is not compatible with php7, Horde 6 does. The last TLS policy breaks horde, php54 is not fully compatible with it