Invalid repository config: neither modelClass nor modelName was specified

[jogaec22]

Describe the bug
I'm not sure but looks like an error regarding the Rest layer, some config about the models but I don't know what exactly it's happening and neither if it has happened to someone else, but all the API project was damaged in my local because of this error.

the server gets up fine, it's when calling an endpoint that I have the error, which is as follows:

Logs
Unhandled error in GET /questionnaires: 500 Error: Invalid repository config: neither modelClass nor modelName was specified.
at Object.resolve (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/repository/dist/decorators/repository.decorator.js:104:15)
at /home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/resolver.js:97:30
at /home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/resolution-session.js:91:53
at tryCatchFinally (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/value-promise.js:184:18)
at Object.tryWithFinally (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/value-promise.js:163:12)
at Function.runWithInjection (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/resolution-session.js:91:32)
at resolve (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/resolver.js:94:61)
at /home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/resolver.js:174:16
at Object.resolveList (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/value-promise.js:136:32)
at resolveInjectedArguments (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/resolver.js:157:28)
at Object.instantiateClass (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/resolver.js:40:27)
at /home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/binding.js:619:38
at Binding._getValue (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/binding.js:476:20)
at /home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/binding.js:329:29
at /home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/resolution-session.js:71:53
at tryCatchFinally (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/value-promise.js:184:18)
at Object.tryWithFinally (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/value-promise.js:163:12)
at Function.runWithBinding (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/resolution-session.js:71:32)
at Binding.getValue (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/binding.js:320:67)
at RequestContext.getValueOrPromise (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/context.js:591:36)
at RequestContext.get (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/core/node_modules/@loopback/context/dist/context.js:504:21)
at HttpHandler._handleRequest (/home/jose/development/mushroomsoft/communities/communities/packages/api/node_modules/@loopback/rest/dist/http-handler.js:63:47)
GET /communities-api/questionnaires 500 32.907 ms -

Additional information

• I am using a mongo image in a docker container, so the config models of my project are about MongoDB.
• In production and on the machines of other friends of my team, there is no such problem, so I think it is something wrong in my local (with the last changes from master and I continue with that error).
• I'm using ubuntu 20.04, but in another machine with win 10, the error has not happened.

I have done almost everything without having a solution, please if anyone has any idea of ​​what could happen I will be very grateful.

[AlexBarciaJS]

Change your node version, if you are using node 12 change to node 14, works for me !