fix(proxy-state-tree): only dispose mutation trees when unbound action finishes

Author: christianalfoni

packages/node_modules/proxy-state-tree/src/Proxyfier.ts

@@ -26,7 +26,11 @@ export class Proxifier {
   ensureMutationTrackingIsEnabled(path) {
     if (this.tree.master.options.devmode && !this.tree.canMutate()) {
       throw new Error(
-        `proxy-state-tree - You are mutating the path "${path}", but it is not allowed`
+        `proxy-state-tree - You are mutating the path "${path}", but it is not allowed. The following could have happened:
+        
+        - You are passing state to a 3rd party tool trying to manipulate the state
+        - You are running an asynchronous action from an other action where you forgot to "await" it
+        `
       )
     }
   }