Hello! I try to install cumulussubscriptions-plugin, and now have the following error:

Problem 1

• initbiz/cumulussubscriptions-plugin[2.0.5, ..., 2.0.6] require initbiz/cumuluscore-plugin dev-master -> found initbiz/cumuluscore-plugin[dev-master] but it conflicts with your root composer.json require (^3.5).
• Root composer.json requires initbiz/cumulussubscriptions-plugin ^2.0 -> satisfiable by initbiz/cumulussubscriptions-plugin[2.0.5, 2.0.6].

Can you help me with it?

I found how to do it! Just delete composer.lock and in composer.json delete this line: "initbiz/cumuluscore-plugin": "^3.5"

Now it's done