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    <title>topic Dev Web AppBuilder Upgrade issues... in ArcGIS Web AppBuilder Questions</title>
    <link>https://community.esri.com/t5/arcgis-web-appbuilder-questions/dev-web-appbuilder-upgrade-issues/m-p/729426#M19240</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;I recently installed WAB 2.15. Then, migrated my app from WAB 2.9. Everything seems to work except for a couple of JS errors on startup:&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;PRE class="lia-code-sample line-numbers language-none"&gt;init.js:37 Error: multipleDefine
 at c (init.js:11)
 at Na (init.js:33)
 at init.js:33
 at e (init.js:10)
 at ab (init.js:33)
 at q (init.js:31)
 at HTMLScriptElement.&amp;lt;anonymous&amp;gt; (init.js:35)
(anonymous) @ init.js:37

init.js:28 Uncaught TypeError: jimuMain.initApp is not a function
 at init.js:223
 at ja (init.js:28)
 at init.js:29
 at ka (init.js:28)
 at ha (init.js:28)
 at q (init.js:31)
 at HTMLScriptElement.&amp;lt;anonymous&amp;gt; (init.js:35)&lt;/PRE&gt;&lt;PRE class="lia-code-sample line-numbers language-none"&gt;init.js:1015 Uncaught TypeError: Cannot read property 'toLowerCase' of null
 at Object.esri-svg (init.js:1015)
 at g.has (init.js:11)
 at r (init.js:55)
 at Object.p.normalize (init.js:55)
 at Xa (init.js:24)
 at init.js:26
 at e (init.js:10)
 at mb (init.js:26)
 at ia (init.js:27)
 at ja (init.js:28)


&lt;/PRE&gt;&lt;P&gt;The first error always appears, while the second and third are somewhat random but frequent. I have removed all of my widgets to try and track down the source of these issue but have not had any luck.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Any ideas?&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Thanks in advance,&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Mark&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Sun, 12 Dec 2021 16:51:28 GMT</pubDate>
    <dc:creator>Lake_Country_GIS</dc:creator>
    <dc:date>2021-12-12T16:51:28Z</dc:date>
    <item>
      <title>Dev Web AppBuilder Upgrade issues...</title>
      <link>https://community.esri.com/t5/arcgis-web-appbuilder-questions/dev-web-appbuilder-upgrade-issues/m-p/729426#M19240</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;I recently installed WAB 2.15. Then, migrated my app from WAB 2.9. Everything seems to work except for a couple of JS errors on startup:&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;PRE class="lia-code-sample line-numbers language-none"&gt;init.js:37 Error: multipleDefine
 at c (init.js:11)
 at Na (init.js:33)
 at init.js:33
 at e (init.js:10)
 at ab (init.js:33)
 at q (init.js:31)
 at HTMLScriptElement.&amp;lt;anonymous&amp;gt; (init.js:35)
(anonymous) @ init.js:37

init.js:28 Uncaught TypeError: jimuMain.initApp is not a function
 at init.js:223
 at ja (init.js:28)
 at init.js:29
 at ka (init.js:28)
 at ha (init.js:28)
 at q (init.js:31)
 at HTMLScriptElement.&amp;lt;anonymous&amp;gt; (init.js:35)&lt;/PRE&gt;&lt;PRE class="lia-code-sample line-numbers language-none"&gt;init.js:1015 Uncaught TypeError: Cannot read property 'toLowerCase' of null
 at Object.esri-svg (init.js:1015)
 at g.has (init.js:11)
 at r (init.js:55)
 at Object.p.normalize (init.js:55)
 at Xa (init.js:24)
 at init.js:26
 at e (init.js:10)
 at mb (init.js:26)
 at ia (init.js:27)
 at ja (init.js:28)


&lt;/PRE&gt;&lt;P&gt;The first error always appears, while the second and third are somewhat random but frequent. I have removed all of my widgets to try and track down the source of these issue but have not had any luck.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Any ideas?&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Thanks in advance,&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Mark&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Sun, 12 Dec 2021 16:51:28 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcgis-web-appbuilder-questions/dev-web-appbuilder-upgrade-issues/m-p/729426#M19240</guid>
      <dc:creator>Lake_Country_GIS</dc:creator>
      <dc:date>2021-12-12T16:51:28Z</dc:date>
    </item>
    <item>
      <title>Re: Dev Web AppBuilder Upgrade issues...</title>
      <link>https://community.esri.com/t5/arcgis-web-appbuilder-questions/dev-web-appbuilder-upgrade-issues/m-p/729427#M19241</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Was able to solve this. Possibly/probably user error. After moving to the latest version of dev WAB, I must of copied the old env.js file over from the previous versions application. After adding in the latest env.js all is well.&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Thu, 05 Mar 2020 17:42:19 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcgis-web-appbuilder-questions/dev-web-appbuilder-upgrade-issues/m-p/729427#M19241</guid>
      <dc:creator>Lake_Country_GIS</dc:creator>
      <dc:date>2020-03-05T17:42:19Z</dc:date>
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