No longer works with upgraded Vue and Vuex

I am using vuex-persist@2.0.1

I recently upgraded vue and vuex. vue@2.6.10 vuex@3.1.0

Before the upgrade I had vuex-persist working perfectly, in my typescript project, with the provided documentation. After the upgrade, I now get an error in my Store. Here is my code:

const vuexAllModules = new VuexPersistence({
	storage: window.localStorage
});

export default new Vuex.Store<RootState>({
	strict: !config.isProd,
	modules: {
		module1,
		module2
	},
	state: {},
	getters: {},
	mutations: {},
	actions: {},
	plugins: [vuexAllModules.plugin] // <<<<-----SOURCE OF ERROR
});

ERROR

Type 'Plugin<unknown>[]' is not assignable to type 'Plugin<RootState>[]'.
  Type 'Plugin<unknown>' is not assignable to type 'Plugin<RootState>'.
    Types of parameters 'store' and 'store' are incompatible.
      Type 'Store<RootState>' is not assignable to type 'Store<unknown>'.
        Types of property 'registerModule' are incompatible.
          Type '{ <T>(path: string, module: Module<T, RootState>, options?: ModuleOptions | undefined): void; <T>(path: string[], module: Module<T, RootState>, options?: ModuleOptions | undefined): void; }' is not assignable to type '{ <T>(path: string, module: Module<T, unknown>, options?: ModuleOptions | undefined): void; <T>(path: string[], module: Module<T, unknown>, options?: ModuleOptions | undefined): void; }'.
            Types of parameters 'module' and 'module' are incompatible.
              Type 'Module<any, unknown>' is not assignable to type 'Module<any, RootState>'.
                Types of property 'actions' are incompatible.
                  Type 'ActionTree<any, unknown> | undefined' is not assignable to type 'ActionTree<any, RootState> | undefined'.
                    Type 'ActionTree<any, unknown>' is not assignable to type 'ActionTree<any, RootState>'.
                      Index signatures are incompatible.
                        Type 'Action<any, unknown>' is not assignable to type 'Action<any, RootState>'.
                          Type 'ActionHandler<any, unknown>' is not assignable to type 'Action<any, RootState>'.
                            Type 'ActionHandler<any, unknown>' is not assignable to type 'ActionHandler<any, RootState>'.
                              Type 'unknown' is not assignable to type 'RootState'.ts(2322)
index.d.ts(96, 3): The expected type comes from property 'plugins' which is declared here on type 'StoreOptions<RootState>'

[martijnboland]

Try adding the generic parameter RootState to the VuexPersistence consructor

const vuexAllModules = new VuexPersistence<RootState>({

That worked for us

[nthx]

Check also if typescript was upgraded as well. It might be due to changes in it. For me it helped to downgrade typescript from 3.7. to 3.4.x (3.5.x introduced this error)