Error in building an angular app.

[Rommel0104]

I am getting the error : ERROR in ../node_modules/angular-mentions/lib/mention-list.component.d.ts:26:9 - error TS1086: An accessor cannot be declared in an ambient context. I would appreciate any thoughts to help me solve the issue.
Additional information here is my ng cli version.

Angular CLI: 8.3.29
Node: 12.22.12
OS: win32 x64
Angular:
...

Package Version

@angular-devkit/architect 0.803.29
@angular-devkit/core 8.3.29
@angular-devkit/schematics 8.3.29
@schematics/angular 8.3.29
@schematics/update 0.803.29
rxjs 6.4.0

[vigneshjayakumar]

Hi Rommel0104,
Did you found the solution for this issue?

[srujanmelam]

1. first fork the repo into your github
2. clone into your local machine
3. get into APM-start folder
4. run command> npm install
   5)and finally> npm start in the same file
   NOTE: if you are getting any errors make sure you updated your npm and angular versions to the latest