fix emd id case for volume streaming

src/mol-plugin/behavior/dynamic/volume-streaming/behavior.ts

@@ -99,7 +99,7 @@ export namespace VolumeStreaming {
         channels: Channels = {}
 
         private async queryData(box?: Box3D) {
-            let url = urlCombine(this.info.serverUrl, `${this.info.kind}/${this.info.dataId}`);
+            let url = urlCombine(this.info.serverUrl, `${this.info.kind}/${this.info.dataId.toLowerCase()}`);
 
             if (box) {
                 const { min: a, max: b } = box;

src/mol-plugin/behavior/dynamic/volume-streaming/transformers.ts

@@ -115,7 +115,7 @@ const CreateVolumeStreamingInfo = PluginStateTransform.BuiltIn({
         const dataId = params.dataId;
         const emDefaultContourLevel = params.source.name === 'em' ? params.source.params.isoValue : VolumeIsoValue.relative(1);
         await taskCtx.update('Getting server header...');
-        const header = await plugin.fetch<VolumeServerHeader>({ url: urlCombine(params.serverUrl, `${params.source.name}/${dataId}`), type: 'json' }).runInContext(taskCtx);
+        const header = await plugin.fetch<VolumeServerHeader>({ url: urlCombine(params.serverUrl, `${params.source.name}/${dataId.toLocaleLowerCase()}`), type: 'json' }).runInContext(taskCtx);
         const data: VolumeServerInfo.Data = {
             serverUrl: params.serverUrl,
             dataId,