An error occurs when submitting a survey with a Signature Pad question specified and then hidden by a condition

[ninjamon23]

Are you requesting a feature, reporting a bug or asking a question?

Bug

What is the current behavior?

Unable to complete the forms. Error is shown that it was a not able to clear the values of the signature pad

What is the expected behavior?

Able to complete the forms

How would you reproduce the current behavior (if this is a bug)?

1. Create a form with a signature pads with conditions to show or hide based on a certain field
2. When viewing and signing the form( using survey-vue3-ui) update the value of the certain field that will show or hide signature pads
3. Click submit/complete and error will be shown

Workaround we have found

We disabled the clearInvisibleValues property to fix the issue and continue the forms

Specify your

• browser: any
• browser version:any
• surveyjs platform (angular or react or jquery or knockout or vue): vue using survey-vue3-ui
• surveyjs version: 1.11.5

[JaneSjs]

Hello, Thank you for reporting this issue. I reproduced it on my end: View Demo. To reproduce the issue, set Yes, put a signature, and click No. Submit the survey. The following issue occurs:

Uncaught TypeError: Cannot read properties of null (reading 'clear')
    at t.refreshCanvas (survey.core.min.js:11:14499)
    at t.clearValue (survey.core.min.js:11:19954)
    at t.clearValueIfInvisibleCore (survey.core.min.js:6:333746)
    at t.clearValueIfInvisible (survey.core.min.js:6:333625)
    at t.clearInvisibleQuestionValues (survey.core.min.js:6:828003)
    at t.clearUnusedValues (survey.core.min.js:6:827460)
    at t.doComplete (survey.core.min.js:6:792375)
    at t.doCurrentPageCompleteCore (survey.core.min.js:6:784634)
    at t.doCurrentPageComplete (survey.core.min.js:6:784482)
    at t.completeLastPage (survey.core.min.js:6:783258)

We will research this issue and update you shortly.