IE11 and Edge error

[thul]

I have a project where i use Ckeditor with the a11ychecker, i use the following versions: CKeditor 4.5.9, A11ychecker 1.0.0, Balloonpanel 4.5.9 with jQuery 3.x.

When clicking the a11ychecker button it causes a javascript error "Object doesn't support property or method 'exec' ". Which occurs in here https://github.com/cksource/ckeditor-plugin-a11ychecker/blob/5d497a5ade75e9fbe46c4bb70880197ede1c4152/plugin.js#L224

It works fine in Safari, Chrome and Firefox. It's just IE11 and Edge that are giving problems.

This is the config im using

{
                language: 'nl',
                skin: 'icy_orange',
                forceCustomDomain: true,
                width: '100% -2px',
                toolbarLocation: 'top',
                format_tags: 'p;h2;h3;h4;h5;h6',
                extraPlugins: 'showblocks,a11ychecker,balloonpanel',
                a11ychecker_quailParams: {
                    guideline: [
                        'aAdjacentWithSameResourceShouldBeCombined',
                        'aImgAltNotRepetitive',
                        'aLinksAreSeparatedByPrintableCharacters',
                        'aMustNotHaveJavascriptHref',
                        'aSuspiciousLinkText',
                        'documentVisualListsAreMarkedUp',
                        'headerH1',
                        'headerH2',
                        'headerH3',
                        'imgAltIsDifferent',
                        'imgAltIsTooLong',
                        'imgAltNotEmptyInAnchor',
                        'imgAltTextNotRedundant',
                        'imgHasAlt',
                        'linkHasAUniqueContext',
                        'pNotUsedAsHeader',
                        'tableDataShouldHaveTh',
                        'tableNotUsedForLayout'
                    ]
                },
                toolbar: 'Basic',
                toolbar_Basic: [
                    { name: 'tools', items: [ 'A11ychecker' ] },
                    { name: 'document', items: [ 'Source' ] },
                    { name: 'styles', items: [ 'Format' ] },
                    { name: 'basicstyles', items: [ 'Bold', 'Italic' ] },
                    { name: 'lists', items: ['NumberedList', 'BulletedList']},
                    { name: 'tools', items: [ 'ShowBlocks' ] },
                    { name: 'links', items: [ 'Link', 'Unlink'] },
                    { name: 'images', items: [ 'Image'] },
                    { name: 'clipboard', items: [ 'PasteText' ] }
                ]
            };

Am i doing something wrong? is it a bug? what would solve this issue im having? Any help / suggestions are welcome