getting error in building angular app during setting front end extension in v 8.8

💬 General Discussion
1

i followed steps in this link to set up frontend extension, Setting Up a Front-End Extension Module 8.8+ :: SuiteCRM Documentation but i get error in command yarn build
C:\xampp\htdocs\SuiteCRM-8.8.0\extensions\myExt\app>yarn build
Internal Error: Expected an indexed object, got a string instead. Does your file follow Yaml’s rules?
at O6e (C:\Users\Mezzat\AppData\Local\node\corepack\v1\yarn\4.6.0\yarn.js:64:174)
at Ki (C:\Users\Mezzat\AppData\Local\node\corepack\v1\yarn\4.6.0\yarn.js:64:434)
at t.setupResolutions (C:\Users\Mezzat\AppData\Local\node\corepack\v1\yarn\4.6.0\yarn.js:210:329)
at async t.find (C:\Users\Mezzat\AppData\Local\node\corepack\v1\yarn\4.6.0\yarn.js:207:10477)
at async qE.execute (C:\Users\Mezzat\AppData\Local\node\corepack\v1\yarn\4.6.0\yarn.js:518:307)
at async qE.validateAndExecute (C:\Users\Mezzat\AppData\Local\node\corepack\v1\yarn\4.6.0\yarn.js:94:787)
at async t.run (C:\Users\Mezzat\AppData\Local\node\corepack\v1\yarn\4.6.0\yarn.js:98:3249)
at async wE.execute (C:\Users\Mezzat\AppData\Local\node\corepack\v1\yarn\4.6.0\yarn.js:429:497)
at async wE.validateAndExecute (C:\Users\Mezzat\AppData\Local\node\corepack\v1\yarn\4.6.0\yarn.js:94:787)
at async t.run (C:\Users\Mezzat\AppData\Local\node\corepack\v1\yarn\4.6.0\yarn.js:98:3249)