Mac Cannot Load Up Launcher....?!

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UnionCraft

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Jul 29, 2019
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Getting it too on Windows (as are my members)
  1. [12:29:42] [INFO] ModpackLoader.run:58: Loading modpack information for modpacks.xml...
  2. [12:29:42] [ERROR] LauncherConsole$OutputOverride.write:89: From Console: [Fatal Error] :172:129: The value of attribute "description" associated with an element type "null" must not contain the '<' character.
  3. [12:29:42] [ERROR] DOMParser.parse:257->ModpackLoader.run:77: Exception reading modpack file: org.xml.sax.SAXParseException; lineNumber: 172; columnNumber: 129; The value of attribute "description" associated with an element type "null" must not contain the '<' character.
Thats the issue, theres an < in the modpack.xml file and there shouldn't be.
 
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chyne

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Jul 29, 2019
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The description attribute for the Infamy mod has invalid markup (there are two <br> tags in there). Seems to download the modpacks.xml each time from the server, so fixing locally does nothing.
 
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iXXer

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Jul 29, 2019
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On Windows I was able to open the modpacks.xml file and replace the </br></br> with &lt;/br&gt;&lt;/br&gt;
Then mark the file read only and it worked. However when this file gets fixed you will have to remember to mark the file back as not read only, otherwise you will never get any changes.
 
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DoubleDigger

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Jul 29, 2019
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I got that error too, but I ended up deleting the launcher, and the FTB launcher folder in AppData\Roaming, then downloading the latest launcher from the main page. It loaded up and showed the modpacks fine again, but now I get this error when launching Magic Farm 2:

Error: Could not find or load main class net.minecraft.launchwrapper.Launch

Then the launcher doesn't do anything else.
 
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