Error cannot read property 'toLowerCase'

[NektariosFifes]

When i write a draft on admin panel this error shows up and i cannot publish the draft.
TypeError: Cannot read property 'toLowerCase' of undefined at toSlug (/home/nektarios-fifes/letterpad/letterpad/src/shared/slugify.ts:9:6) at Object.slugify (/home/nektarios-fifes/letterpad/letterpad/src/shared/slugify.ts:19:10) at Object.<anonymous> (/home/nektarios-fifes/letterpad/letterpad/src/api/models/post.ts:142:27) at Generator.next (<anonymous>) at fulfilled (/home/nektarios-fifes/letterpad/letterpad/src/api/models/post.ts:5:58) error.message : Cannot destructure property cover_image_width` of 'undefined' or 'null'.

[error] api/server.ts: Cannot destructure property cover_image_width of 'undefined' or 'null'. { code: 'INTERNAL_SERVER_ERROR',
exception:
{ stacktrace:
[ 'TypeError: Cannot destructure property cover_image_width of 'undefined' or 'null'.',
' at normalizePost (/home/nektarios-fifes/letterpad/letterpad/src/api/resolvers/post.js:418:7)',
' at /home/nektarios-fifes/letterpad/letterpad/src/api/resolvers/post.js:349:30',
' at Generator.next ()',
' at fulfilled (/home/nektarios-fifes/letterpad/letterpad/src/api/resolvers/post.js:5:58)' ] } } { [GraphQLError: Cannot destructure property cover_image_width of 'undefined' or 'null'.]
message:
'Cannot destructure property cover_image_width of 'undefined' or 'null'.',
locations: [ { line: 2, column: 3 } ],
path: [ 'updatePost' ],
extensions:
{ code: 'INTERNAL_SERVER_ERROR',
exception: { stacktrace: [Array] } } } {"message":"Cannot destructure property cover_image_width of 'undefined' or 'null'.","locations":[{"line":2,"column":3}],"path":["updatePost"],"extensions":{"code":"INTERNAL_SERVER_ERROR","exception":{"stacktrace":["TypeError: Cannot destructure property cover_image_width of 'undefined' or 'null'."," at normalizePost (/home/nektarios-fifes/letterpad/letterpad/src/api/resolvers/post.js:418:7)"," at /home/nektarios-fifes/letterpad/letterpad/src/api/resolvers/post.js:349:30"," at Generator.next ()"," at fulfilled (/home/nektarios-fifes/letterpad/letterpad/src/api/resolvers/post.js:5:58)"]}}}
`

[abhisaha1]

Yea, its the same for this as well. I could not update this theme. For now only the hugo theme will work.

[NektariosFifes]

ok