Invalid appearance "standard", valid values are "fill" or "outline".

[minahmoghadam]

• MaterialDesignFrameworkModule — Material Design
• Bootstrap3FrameworkModule — Bootstrap 3
• Bootstrap4FrameworkModule — Bootstrap 4
• NoFrameworkModule — plain HTML
• Other (please specify below)

After Upgrading Angular and Angular Material versions to v15, Angular Material has an issue with the appearance property and the add button also is hidden.

Error: global-error-handler.ts:16 Error: MatFormField: Invalid appearance "standard", valid values are "fill" or "outline".

• OS: [e.g. iOS] MacOs 13.2.1
• Browser [e.g. chrome, safari] Chrome
• Version [e.g. 22] 0.8.0