Help i can not setup my world i have test 1.16 to 1.13

[09:46:45 WARN]: java.io.FileNotFoundException: ./lobby/session.lock (Permission denied)
[09:46:45 WARN]: at java.base/java.io.FileOutputStream.open0(Native Method)
[09:46:45 WARN]: at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298)
[09:46:45 WARN]: at java.base/java.io.FileOutputStream.(FileOutputStream.java:237)
[09:46:45 WARN]: at java.base/java.io.FileOutputStream.(FileOutputStream.java:187)
[09:46:45 WARN]: at net.minecraft.server.v1_13_R2.WorldNBTStorage.j(WorldNBTStorage.java:104)
[09:46:45 WARN]: at net.minecraft.server.v1_13_R2.WorldNBTStorage.(WorldNBTStorage.java:98)
[09:46:45 WARN]: at net.minecraft.server.v1_13_R2.ServerNBTManager.(SourceFile:20)
[09:46:45 WARN]: at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:352)
[09:46:45 WARN]: at net.minecraft.server.v1_13_R2.DedicatedServer.init(DedicatedServer.java:316)
[09:46:45 WARN]: at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:787)
[09:46:45 WARN]: at java.base/java.lang.Thread.run(Thread.java:829)
[09:46:45 ERROR]: Encountered an unexpected exception
java.lang.RuntimeException: Failed to check session lock for world located at ./lobby, aborting. Stop the server and delete the session.lock in this world to prevent further issues.
at net.minecraft.server.v1_13_R2.WorldNBTStorage.j(WorldNBTStorage.java:114) ~[patched_1.13.2.jar:git-Paper-655]
at net.minecraft.server.v1_13_R2.WorldNBTStorage.(WorldNBTStorage.java:98) ~[patched_1.13.2.jar:git-Paper-655]
at net.minecraft.server.v1_13_R2.ServerNBTManager.(SourceFile:20) ~[patched_1.13.2.jar:git-Paper-655]
at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:352) ~[patched_1.13.2.jar:git-Paper-655]
at net.minecraft.server.v1_13_R2.DedicatedServer.init(DedicatedServer.java:316) ~[patched_1.13.2.jar:git-Paper-655]
at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:787) ~[patched_1.13.2.jar:git-Paper-655]
at java.lang.Thread.run(Thread.java:829) [?:?]
[09:46:45 ERROR]: This crash report has been saved to: /var/lib/pufferpanel/servers/df363e63/./crash-reports/crash-2021-05-02_09.46.45-server.txt