implode(): Argument #1 ($pieces) must be of type array, string given

[frederikmillingpytlick]

Version: v4.0.1

Page: /mod/questionnaire/report.php?instance=1&group=0

I have no clue how to reproduce.

[a-schild]

We see the same error here, with 4.1.3
The cause is, that at this point of the code, we have no labels to display in the rose chart

Setting "questionnaire | usergraph" to no "solves" the problem, but you won't have a pie chart of the results

[superfoght]

We see the same error here, with 4.1.3 The cause is, that at this point of the code, we have no labels to display in the rose chart

Setting "questionnaire | usergraph" to no "solves" the problem, but you won't have a pie chart of the results

Thanks. That might be a hotfix for this particular client :)