I am trying to compile one of the old projects but I am getting the following error:
B4X:
B4A Version: 12.20
Parsing code. (0.71s)
Java Version: 11
Building folders structure. (0.31s)
Compiling code. (0.42s)
Compiling layouts code. (0.03s)
Organizing libraries. (0.00s)
(AndroidX SDK)
Compiling resources (1.24s)
Linking resources (6.46s)
Compiling generated Java code. (0.52s)
Finding libraries that need to be dexed. (0.06s)
Dex code (1.85s)
Dex merge Error
Error in D:\ANDROID\tools\..\extras\b4a_local\unpacked-guava-30.1.1-63785595109973\dex_v1\guava-30.1.1.zip:classes.dex:
Type com.google.common.util.concurrent.ListenableFuture is defined multiple times: D:\ANDROID\tools\..\extras\b4a_local\unpacked-guava-30.1.1-63785595109973\dex_v1\guava-30.1.1.zip:classes.dex, D:\ANDROID\tools\..\extras\b4a_local\unpacked-com.google.guava-listenablefuture-63810054328000\dex_v1\com.google.guava-listenablefuture.zip:classes.dex
Compilation failed
Exception in thread "main" java.lang.RuntimeException: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: D:\ANDROID\tools\..\extras\b4a_local\unpacked-guava-30.1.1-63785595109973\dex_v1\guava-30.1.1.zip:classes.dex
at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:98)
at com.android.tools.r8.D8.main(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:4)
Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: D:\ANDROID\tools\..\extras\b4a_local\unpacked-guava-30.1.1-63785595109973\dex_v1\guava-30.1.1.zip:classes.dex
at Version.fakeStackEntry(Version_3.3.20-dev+aosp1.java:0)
at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:75)
at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:28)
at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:27)
at com.android.tools.r8.internal.vj.b(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:2)
at com.android.tools.r8.D8.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:22)
at com.android.tools.r8.D8.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:17)
at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:85)
... 1 more
Caused by: com.android.tools.r8.internal.f: Type com.google.common.util.concurrent.ListenableFuture is defined multiple times: D:\ANDROID\tools\..\extras\b4a_local\unpacked-guava-30.1.1-63785595109973\dex_v1\guava-30.1.1.zip:classes.dex, D:\ANDROID\tools\..\extras\b4a_local\unpacked-com.google.guava-listenablefuture-63810054328000\dex_v1\com.google.guava-listenablefuture.zip:classes.dex
at com.android.tools.r8.internal.YS.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:14)
at com.android.tools.r8.internal.YS.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:22)
at com.android.tools.r8.internal.cN.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:36)
at com.android.tools.r8.internal.cN.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:10)
at java.base/java.util.concurrent.ConcurrentHashMap.merge(ConcurrentHashMap.java:2048)
at com.android.tools.r8.internal.cN.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:6)
at com.android.tools.r8.graph.E2$a.e(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:4)
at com.android.tools.r8.dex.b.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:105)
at com.android.tools.r8.dex.b.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:28)
at com.android.tools.r8.D8.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:25)
at com.android.tools.r8.D8.d(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:609)
at com.android.tools.r8.D8.c(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:1)
at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:24)
... 5 more