mirror of
https://github.com/PlaceholderAPI/PlaceholderAPI
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35 lines
1.6 KiB
Markdown
35 lines
1.6 KiB
Markdown
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This page lists common issues you may encounter with PlaceholderAPI and how you can solve them.
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If you have more questions, feel free to join the [Discord Server](https://discord.gg/helpchat).
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## `java.lang.NoClassDefFoundError: com/google/gson/Gson`
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If you encounter an issue such as
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```
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org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: com/google/gson/Gson
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```
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does it mean that the Server you're using PlaceholderAPI on does not have Gson included.
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This is often the case for servers running 1.8 or older. To fix this, make sure to use at least 1.8.8 as that version does include the required dependency.
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## Expansions won't work
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If one or multiple expansions don't work, make sure you checked the following:
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- You executed `/papi reload` after downloading the expansion(s).
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- Any required plugin is installed and enabled.
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- The expansion is valid (See next sections).
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## `Failed to load expansion class <expansion> ...`
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### `- One of its properties is null which is not allowed`
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When this error appears does it mean that either `getAuthor()`, `getIdentifier()` or `getVersion()` in the expansion return `null` which is not allowed.
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In such a case, contact the developer of the expansion and inform them about this issue and that it should be fixed.
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### `(Is a dependency missing?)`
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This error is given whenever the expansion cannot be loaded, which often happens due to a missing dependency (required plugin) or because creating an expansion instance failed.
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The only thing you can do is to provide the full error so that we can check if the issue is caused by PlaceholderAPI (More unlikely) or by the expansion.
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